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Influence of wave-front aberrations on bit error rate in inter-satellite laser communications

Influence of wave-front aberrations on bit error rate in inter-satellite laser communications,10.1016/j.optcom.2011.02.081,Optics Communications,Yuqia

Influence of wave-front aberrations on bit error rate in inter-satellite laser communications   (Citations: 1)
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We derive the bit error rate (BER) of inter-satellite laser communication (lasercom) links with on–off-keying systems in the presence of both wave-front aberrations and pointing error, but without considering the noise of the detector. Wave-front aberrations induced by receiver terminal have no influence on the BER, while wave-front aberrations induced by transmitter terminal will increase the BER. The BER depends on the area S which is truncated out by the threshold intensity of the detector (such as APD) on the intensity function in the receiver plane, and changes with root mean square (RMS) of wave-front aberrations. Numerical results show that the BER rises with the increasing of RMS value. The influences of Astigmatism, Coma, Curvature and Spherical aberration on the BER are compared. This work can benefit the design of lasercom system.
Journal: Optics Communications - OPT COMMUN , vol. 284, no. 12, pp. 3065-3069, 2011
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    • ...Considering the combined influence of mechanical vibration and wavefront aberrations, we researched the effect of primary aberrations on the BER [20]...
    • ...The relationship of pointing error and receiver terminal’s displacementisshowninFig.4.Receiverterminal’sdisplacements are distributed according to the probability density [20]...
    • ...where denotes the threshold intensity corresponding to the threshold intensity ,a nd is the probability of . Fig. 6 shows the intensity distribution in the receiver plane with contour line of .Acco rding to( 9), when the receiver terminal is not in the threshold area which is truncated out by the contour line of , the bit error appears. So (12) can be further written as [20]...
    • ...Substituting (5) and (6) into (13) and letting , we can obtain [20]...
    • ...To simplify the problem, the threshold area is considered to be an ellipse and (14) can be rewritten as [20]...
    • ...As proposed in [20], the ellipse radii of and can be determined by following processes that are showninFig.7.1)Choosingasymmetryaxisoranapproximate symmetry axis of the contour line of . 2) Plotting the tangent lines that are parallel to the approximate symmetry axis.Thedistanceofthetwotangentlinesdeterminesoneradius of the ellipse with ,wh ere and are the coordinates of the cross point of the tangent ...

    Yuqiang Yanget al. Research on Bit Error Rate in the Presence of Local Wavefront Aberrati...

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